WebProNews

Hi,

We have used many of the tools mentioned here in the past, some even to date, but my personal favorite has got to be wordze. They aren't exactly free, but the cost is very good in my opinion for the type of data you get. They also have an API, which is included in the cost. Another of my favorites is the new free Google search-based kwd tool. It has much more data and filters than their original Adwords tool.

We also use one we've developed in-house for use on client sites, which is offered for free on our company website. Thought maybe some of your readers may be interested in trying it out. We encourage feedback so please don't hesitate to let us know what you think.

http://www.visible.net/tools/keywords/

really WT is great tool for keyword building

I pay for word tracker, I find this better than any of the free places